CHAPTER XXTII. 



SIMPLE TUMOURS. 



PIBBOMA OR FIBROUS TDMOUR — PAPILLOMA — LIPOMA — NEUROMA— 

 ENCHONDROMA— CRUSTA-PETROSA TUMOURS — PSAMMOMA — OSSE- 

 OUS TUMOURS OSTEOMA — PARASITIC CYSTS — CYSTIC TUMOURS- 

 TEETH TUMOURS SARCOMATA —MELANOSIS — ACTINO-MYCOSIS 



CARCINOMATA HARD CANCER — SOFT CANCER — EPITHELIAL 



CANCER. 



L — SIMPLE OR HISTIGID TUMOURS. 



The most common forms of tumour met with in veterinary 

 practice are fibrous tissue tumours — Fibromata, and ordinary 

 ^varts — Papilloma, fatty tumours — Lipoma, and cartilage 

 tumours — Enchond roma. 



The fibroma, a fibrous tumour usually found in parts whidi 

 contain much fibrous tissue, is slow in its growth, and is not 

 accompanied by pain or tenderness, unless accidentally inflamed ; 

 is of a hard, rounded form, with its surface smooth or divided 

 into lobes ; generally moveable, and contained in a wall of 

 areolar tissue. 



The most familiar example is the subcutaneous waH. These 

 are of various sizes ; some as small as a pea, others as large 

 as a goose's egg, lodged in the subcutaneous areolar tissue, 

 singly or in clusters. They differ much in their degree of con- 

 nection with surrounding parts, being sometimes firmly attached 

 by continuity of tissue, at other times loosely imbedj:led in 

 them, and easily moveable beneath the skin. Although many 

 groups of several tumours in each may exist in the same 

 structure or organ, it is very rare to see tliem co-existent in 

 separat-e organs. They have very few vessels ; indeed, some 

 seem to have no blood-vessels, and no immediate communi- 

 cation with the surrounding parts, but are lodged in a sac, 

 and derive their nourishment by imbibing nutrient.lluid .from 

 its walls. 



